Multiple Custom_model.java error

So Im making a mod where there's going to be allot of custom 3d modeled bullets. When i export a .java model with a certain name it still exports as custom_model.java .And the problem is that when i try to export another model for another bullet it exports as custom_model.java agin even though i renamed it as something else and that leads to mcreator not being able to save 2 files that share the same name. The program i used for modeling is blockbench and the model format is .java as i mentioned multiple times

pls help